release/src-rt-6.x.4708/linux/linux-2.6.36/sound/drivers/opl3/opl3_seq.c

   1 /*
   2  *  Copyright (c) by Uros Bizjak <uros@kss-loka.si>
   3  *
   4  *  Midi Sequencer interface routines for OPL2/OPL3/OPL4 FM
   5  *
   6  *  OPL2/3 FM instrument loader:
   7  *   alsa-tools/seq/sbiload/
   8  *
   9  *   This program is free software; you can redistribute it and/or modify
  10  *   it under the terms of the GNU General Public License as published by
  11  *   the Free Software Foundation; either version 2 of the License, or
  12  *   (at your option) any later version.
  13  *
  14  *   This program is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with this program; if not, write to the Free Software
  21  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  22  *
  23  */
  24
  25 #include "opl3_voice.h"
  26 #include <linux/init.h>
  27 #include <linux/moduleparam.h>
  28 #include <sound/initval.h>
  29
  30 MODULE_AUTHOR("Uros Bizjak <uros@kss-loka.si>");
  31 MODULE_LICENSE("GPL");
  32 MODULE_DESCRIPTION("ALSA driver for OPL3 FM synth");
  33
  34 int use_internal_drums = 0;
  35 module_param(use_internal_drums, bool, 0444);
  36 MODULE_PARM_DESC(use_internal_drums, "Enable internal OPL2/3 drums.");
  37
  38 int snd_opl3_synth_use_inc(struct snd_opl3 * opl3)
  39 {
  40         if (!try_module_get(opl3->card->module))
  41                 return -EFAULT;
  42         return 0;
  43
  44 }
  45
  46 void snd_opl3_synth_use_dec(struct snd_opl3 * opl3)
  47 {
  48         module_put(opl3->card->module);
  49 }
  50
  51 int snd_opl3_synth_setup(struct snd_opl3 * opl3)
  52 {
  53         int idx;
  54         struct snd_hwdep *hwdep = opl3->hwdep;
  55
  56         mutex_lock(&hwdep->open_mutex);
  57         if (hwdep->used) {
  58                 mutex_unlock(&hwdep->open_mutex);
  59                 return -EBUSY;
  60         }
  61         hwdep->used++;
  62         mutex_unlock(&hwdep->open_mutex);
  63
  64         snd_opl3_reset(opl3);
  65
  66         for (idx = 0; idx < MAX_OPL3_VOICES; idx++) {
  67                 opl3->voices[idx].state = SNDRV_OPL3_ST_OFF;
  68                 opl3->voices[idx].time = 0;
  69                 opl3->voices[idx].keyon_reg = 0x00;
  70         }
  71         opl3->use_time = 0;
  72         opl3->connection_reg = 0x00;
  73         if (opl3->hardware >= OPL3_HW_OPL3) {
  74                 /* Clear 4-op connections */
  75                 opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT,
  76                                  opl3->connection_reg);
  77                 opl3->max_voices = MAX_OPL3_VOICES;
  78         }
  79         return 0;
  80 }
  81
  82 void snd_opl3_synth_cleanup(struct snd_opl3 * opl3)
  83 {
  84         unsigned long flags;
  85         struct snd_hwdep *hwdep;
  86
  87         /* Stop system timer */
  88         spin_lock_irqsave(&opl3->sys_timer_lock, flags);
  89         if (opl3->sys_timer_status) {
  90                 del_timer(&opl3->tlist);
  91                 opl3->sys_timer_status = 0;
  92         }
  93         spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);
  94
  95         snd_opl3_reset(opl3);
  96         hwdep = opl3->hwdep;
  97         mutex_lock(&hwdep->open_mutex);
  98         hwdep->used--;
  99         mutex_unlock(&hwdep->open_mutex);
 100         wake_up(&hwdep->open_wait);
 101 }
 102
 103 static int snd_opl3_synth_use(void *private_data, struct snd_seq_port_subscribe * info)
 104 {
 105         struct snd_opl3 *opl3 = private_data;
 106         int err;
 107
 108         if ((err = snd_opl3_synth_setup(opl3)) < 0)
 109                 return err;
 110
 111         if (use_internal_drums) {
 112                 /* Percussion mode */
 113                 opl3->voices[6].state = opl3->voices[7].state =
 114                         opl3->voices[8].state = SNDRV_OPL3_ST_NOT_AVAIL;
 115                 snd_opl3_load_drums(opl3);
 116                 opl3->drum_reg = OPL3_PERCUSSION_ENABLE;
 117                 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, opl3->drum_reg);
 118         } else {
 119                 opl3->drum_reg = 0x00;
 120         }
 121
 122         if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) {
 123                 if ((err = snd_opl3_synth_use_inc(opl3)) < 0)
 124                         return err;
 125         }
 126         opl3->synth_mode = SNDRV_OPL3_MODE_SEQ;
 127         return 0;
 128 }
 129
 130 static int snd_opl3_synth_unuse(void *private_data, struct snd_seq_port_subscribe * info)
 131 {
 132         struct snd_opl3 *opl3 = private_data;
 133
 134         snd_opl3_synth_cleanup(opl3);
 135
 136         if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM)
 137                 snd_opl3_synth_use_dec(opl3);
 138         return 0;
 139 }
 140
 141 /*
 142  * MIDI emulation operators
 143  */
 144 struct snd_midi_op opl3_ops = {
 145         .note_on =              snd_opl3_note_on,
 146         .note_off =             snd_opl3_note_off,
 147         .key_press =            snd_opl3_key_press,
 148         .note_terminate =       snd_opl3_terminate_note,
 149         .control =              snd_opl3_control,
 150         .nrpn =                 snd_opl3_nrpn,
 151         .sysex =                snd_opl3_sysex,
 152 };
 153
 154 static int snd_opl3_synth_event_input(struct snd_seq_event * ev, int direct,
 155                                       void *private_data, int atomic, int hop)
 156 {
 157         struct snd_opl3 *opl3 = private_data;
 158
 159         snd_midi_process_event(&opl3_ops, ev, opl3->chset);
 160         return 0;
 161 }
 162
 163 /* ------------------------------ */
 164
 165 static void snd_opl3_synth_free_port(void *private_data)
 166 {
 167         struct snd_opl3 *opl3 = private_data;
 168
 169         snd_midi_channel_free_set(opl3->chset);
 170 }
 171
 172 static int snd_opl3_synth_create_port(struct snd_opl3 * opl3)
 173 {
 174         struct snd_seq_port_callback callbacks;
 175         char name[32];
 176         int voices, opl_ver;
 177
 178         voices = (opl3->hardware < OPL3_HW_OPL3) ?
 179                 MAX_OPL2_VOICES : MAX_OPL3_VOICES;
 180         opl3->chset = snd_midi_channel_alloc_set(16);
 181         if (opl3->chset == NULL)
 182                 return -ENOMEM;
 183         opl3->chset->private_data = opl3;
 184
 185         memset(&callbacks, 0, sizeof(callbacks));
 186         callbacks.owner = THIS_MODULE;
 187         callbacks.use = snd_opl3_synth_use;
 188         callbacks.unuse = snd_opl3_synth_unuse;
 189         callbacks.event_input = snd_opl3_synth_event_input;
 190         callbacks.private_free = snd_opl3_synth_free_port;
 191         callbacks.private_data = opl3;
 192
 193         opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
 194         sprintf(name, "OPL%i FM Port", opl_ver);
 195
 196         opl3->chset->client = opl3->seq_client;
 197         opl3->chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks,
 198                                                       SNDRV_SEQ_PORT_CAP_WRITE |
 199                                                       SNDRV_SEQ_PORT_CAP_SUBS_WRITE,
 200                                                       SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
 201                                                       SNDRV_SEQ_PORT_TYPE_MIDI_GM |
 202                                                       SNDRV_SEQ_PORT_TYPE_DIRECT_SAMPLE |
 203                                                       SNDRV_SEQ_PORT_TYPE_HARDWARE |
 204                                                       SNDRV_SEQ_PORT_TYPE_SYNTHESIZER,
 205                                                       16, voices,
 206                                                       name);
 207         if (opl3->chset->port < 0) {
 208                 int port;
 209                 port = opl3->chset->port;
 210                 snd_midi_channel_free_set(opl3->chset);
 211                 return port;
 212         }
 213         return 0;
 214 }
 215
 216 /* ------------------------------ */
 217
 218 static int snd_opl3_seq_new_device(struct snd_seq_device *dev)
 219 {
 220         struct snd_opl3 *opl3;
 221         int client, err;
 222         char name[32];
 223         int opl_ver;
 224
 225         opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
 226         if (opl3 == NULL)
 227                 return -EINVAL;
 228
 229         spin_lock_init(&opl3->voice_lock);
 230
 231         opl3->seq_client = -1;
 232
 233         /* allocate new client */
 234         opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
 235         sprintf(name, "OPL%i FM synth", opl_ver);
 236         client = opl3->seq_client =
 237                 snd_seq_create_kernel_client(opl3->card, opl3->seq_dev_num,
 238                                              name);
 239         if (client < 0)
 240                 return client;
 241
 242         if ((err = snd_opl3_synth_create_port(opl3)) < 0) {
 243                 snd_seq_delete_kernel_client(client);
 244                 opl3->seq_client = -1;
 245                 return err;
 246         }
 247
 248         /* setup system timer */
 249         init_timer(&opl3->tlist);
 250         opl3->tlist.function = snd_opl3_timer_func;
 251         opl3->tlist.data = (unsigned long) opl3;
 252         spin_lock_init(&opl3->sys_timer_lock);
 253         opl3->sys_timer_status = 0;
 254
 255 #ifdef CONFIG_SND_SEQUENCER_OSS
 256         snd_opl3_init_seq_oss(opl3, name);
 257 #endif
 258         return 0;
 259 }
 260
 261 static int snd_opl3_seq_delete_device(struct snd_seq_device *dev)
 262 {
 263         struct snd_opl3 *opl3;
 264
 265         opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
 266         if (opl3 == NULL)
 267                 return -EINVAL;
 268
 269 #ifdef CONFIG_SND_SEQUENCER_OSS
 270         snd_opl3_free_seq_oss(opl3);
 271 #endif
 272         if (opl3->seq_client >= 0) {
 273                 snd_seq_delete_kernel_client(opl3->seq_client);
 274                 opl3->seq_client = -1;
 275         }
 276         return 0;
 277 }
 278
 279 static int __init alsa_opl3_seq_init(void)
 280 {
 281         static struct snd_seq_dev_ops ops =
 282         {
 283                 snd_opl3_seq_new_device,
 284                 snd_opl3_seq_delete_device
 285         };
 286
 287         return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OPL3, &ops,
 288                                               sizeof(struct snd_opl3 *));
 289 }
 290
 291 static void __exit alsa_opl3_seq_exit(void)
 292 {
 293         snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OPL3);
 294 }
 295
 296 module_init(alsa_opl3_seq_init)
 297 module_exit(alsa_opl3_seq_exit)